{"cve":"CVE-2025-66406","nvd":{"published":"2025-12-03T20:16:26.560","modified":"2026-10-18T17:10:00.110","status":"Deferred","description":"Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affects deployments configured with the SSHPOP provisioner. This vulnerability is fixed in 0.29.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H","score":5.0},"cwes":["CWE-863"],"references":["https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:16:40.427100871+00:00"},"epss":{"cve":"CVE-2025-66406","score":0.00151,"percentile":0.04233,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-j7c9-79x7-8hpr","url":"https://osv.dev/vulnerability/GHSA-j7c9-79x7-8hpr","summary":"step-ca Has Improper Authorization Check for SSH Certificate Revocation","modified":"2026-09-10T03:50:31.999339414Z","packages":[{"ecosystem":"Go","name":"github.com/smallstep/certificates","purl":"pkg:golang/github.com/smallstep/certificates","ranges":["<0.29.0"],"fixed":["0.29.0"]}]},{"id":"GO-2025-4181","url":"https://osv.dev/vulnerability/GO-2025-4181","summary":"step-ca Has Improper Authorization Check for SSH Certificate Revocation in github.com/smallstep/certificates","modified":"2026-02-04T03:17:38.588451Z","packages":[{"ecosystem":"Go","name":"github.com/smallstep/certificates","purl":"pkg:golang/github.com/smallstep/certificates","ranges":["<0.29.0"],"fixed":["0.29.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}